Sharks are not just about big jaws, sharp teeth. They have personalities, too

Just like people, different sharks have different levels of sociability. Some sharks who interact more with others will stay in groups, while more solitary sharks would rather drift off alone and camouflage themselves at the bottom.

Shark sociability was rated by how they chose to stay safe when they were less than a year old. Most juvenile sharks chose the "safety in numbers" route. Other less social sharks masked themselves with their surroundings.